My friend I think you will have to sub. Quickfix has a 100% success rate if the temperature is right. If you do not have time I would follow the dilution sticky at the top of the page and hope for the best. Make sure you piss midstream. I say you have a 50-50 chance of passing without subbing, depends on your metabolism and smoking history. It took me 35 days to test clean but I smoked daily for many years. I am 6 foot 2 230 pounds.